what are the chances that nato will get involved here? >> reporter: very slim right now. when you say nato besides the uk and france who have limited capacity to help here, we're talking about america. until the next election is passed and until the next administration wants to get involved in this, we're not going to see any major nato intervention. the backing is firm. that will help bolster turkey's case and push the military back to prevent this thing from happening ever again. but we're really talking about a potential of the future over know fly zone, maybe in months time if nato decides to step forward and seize turkey once again attacked by the syrians. but for now this is very much a rhetorical response and we're going to be talking weeks and months of continued aggression by the syrians as the turkish will see it, until you see any game change like that. >> nick, thank you very much. >>> update on a troubling medical story. the meningitis outbreak in tennessee has spread to five states killing four people. dozens of people now infected with the rare noncontagiou